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authorYonghong Song <yhs@fb.com>2021-08-10 02:51:51 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2021-08-10 11:10:49 +0300
commit87b7b5335e6995a6d64fca98fc67b92b29caac9c (patch)
tree11879d3cfc48083ece2a1f0e9960aed3bcca8792 /net/bpf
parent51e1bb9eeaf7868db56e58f47848e364ab4c4129 (diff)
downloadlinux-87b7b5335e6995a6d64fca98fc67b92b29caac9c.tar.xz
bpf: Add missing bpf_read_[un]lock_trace() for syscall program
Commit 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.") added support for syscall program, which is a sleepable program. But the program run missed bpf_read_lock_trace()/bpf_read_unlock_trace(), which is needed to ensure proper rcu callback invocations. This patch adds bpf_read_[un]lock_trace() properly. Fixes: 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.") Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210809235151.1663680-1-yhs@fb.com
Diffstat (limited to 'net/bpf')
-rw-r--r--net/bpf/test_run.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 1cc75c811e24..caa16bf30fb5 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -7,6 +7,7 @@
#include <linux/vmalloc.h>
#include <linux/etherdevice.h>
#include <linux/filter.h>
+#include <linux/rcupdate_trace.h>
#include <linux/sched/signal.h>
#include <net/bpf_sk_storage.h>
#include <net/sock.h>
@@ -951,7 +952,10 @@ int bpf_prog_test_run_syscall(struct bpf_prog *prog,
goto out;
}
}
+
+ rcu_read_lock_trace();
retval = bpf_prog_run_pin_on_cpu(prog, ctx);
+ rcu_read_unlock_trace();
if (copy_to_user(&uattr->test.retval, &retval, sizeof(u32))) {
err = -EFAULT;